Lec. 12 - ATP and Enzyme Function

Question 1

Compare endergonic/exergonic and exothermic/endothermic rections

Answer 1

Endergonic is a chemical reaction that requires an input of energy to proceed. Exergonic is a chemical reaction that releases energy. Exothermic reaction releases heat energy, endothermic reaction absorbs heat energy.

Question 2

Explain how the DeltaG of a reaction relates to whether it will be spontaneous or non-spon.

Answer 2

If DeltaG is negative, the reaction is exergonic. If it is positive, the reaction is endergonic. If it is zero, the system is at equilibrium.

Question 3

Describe the function of enzymes as catalysts.

Answer 3

Enzymes as catalysts lower activation energy, relate to specificity, form enzyme-substrate complex, and catalyze the reaction.

Question 4

Explain activation energy and how it is affected by enzymes.

Answer 4

Activation energy is the min. amount of energy required for a chem. reaction to occur. It is affected by enzymes because they lower the activation energy, control active site function and transition state stabilization, and facilitate collisions.

Question 5

Explain the difference between the reactant and the product.

Answer 5

Reactants are the initial substances, products are the substances formed as a result of a chemical reaction.